From b557fc4afe1563d26aab58bec05ee84dcd6f9be8 Mon Sep 17 00:00:00 2001
From: Myy Miouyouyou <myy@miouyouyou.fr>
Date: Sun, 11 Mar 2018 22:15:36 +0100
Subject: [PATCH] dw_mmc: The stupid ASUS Reboot patch

The patch didn't apply in the 4.16-rc4 so it had to be "rewritten".
By "rewritten", I mean, move the code blocks accordingly, based on
the new dw_mmc.c file layout.

No major changes were done.

It's still fucking ugly but I have no time to concentrate on this
issue and deal with it accordingly.

Signed-off-by: Myy Miouyouyou <myy@miouyouyou.fr>
---
 drivers/mmc/host/dw_mmc-rockchip.c | 25 +++++++++++++++++++++++++
 drivers/mmc/host/dw_mmc.c          | 31 +++++++++++++++++++++++++++++++
 include/linux/reboot.h             |  2 ++
 kernel/reboot.c                    |  1 +
 4 files changed, 59 insertions(+)

diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index 339295212..a8fe79b14 100644
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -14,10 +14,13 @@
 #include <linux/of_address.h>
 #include <linux/mmc/slot-gpio.h>
 #include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h> // Stupid Tinkerboard Hack
 #include <linux/slab.h>
 
 #include "dw_mmc.h"
 #include "dw_mmc-pltfm.h"
+#include "../core/core.h" // Stupid Tinkerboard Hack
+
 
 #define RK3288_CLKGEN_DIV       2
 
@@ -366,6 +369,27 @@ static int dw_mci_rockchip_probe(struct platform_device *pdev)
 	return 0;
 }
 
+/* Stupid Tinkerboard Hack */
+static void dw_mci_rockchip_platfm_shutdown(struct platform_device *pdev)
+{
+	struct dw_mci *host = platform_get_drvdata(pdev);
+	struct mmc_host *mmc = host->slot->mmc;
+	int ret;
+
+	if(of_machine_is_compatible("asus,rk3288-tinker")){
+
+		mmc_power_off(mmc);
+
+		mdelay(20);
+
+		if (!IS_ERR(mmc->supply.vmmc))
+			ret = regulator_enable(mmc->supply.vmmc);
+
+		if (!IS_ERR(mmc->supply.vqmmc))
+			regulator_set_voltage(mmc->supply.vqmmc, 3000000, 3300000);
+	}
+}
+
 static int dw_mci_rockchip_remove(struct platform_device *pdev)
 {
 	pm_runtime_get_sync(&pdev->dev);
@@ -386,6 +410,7 @@ static const struct dev_pm_ops dw_mci_rockchip_dev_pm_ops = {
 static struct platform_driver dw_mci_rockchip_pltfm_driver = {
 	.probe		= dw_mci_rockchip_probe,
 	.remove		= dw_mci_rockchip_remove,
+	.shutdown	= dw_mci_rockchip_platfm_shutdown, // Stupid Tinkerboard Hack
 	.driver		= {
 		.name		= "dwmmc_rockchip",
 		.of_match_table	= dw_mci_rockchip_match,
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index d9b4acefe..5627c9da6 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -39,8 +39,10 @@
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #include <linux/mmc/slot-gpio.h>
+#include <linux/reboot.h> // Stupid Tinkerboard Hack
 
 #include "dw_mmc.h"
+#include "../core/core.h" // Stupid Tinkerboard hack
 
 /* Common flag combinations */
 #define DW_MCI_DATA_ERROR_FLAGS	(SDMMC_INT_DRTO | SDMMC_INT_DCRC | \
@@ -2782,6 +2784,31 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+/* Stupid Tinkerboard Hack */
+struct dw_mci *mSdhost;
+void setmmcEmergency() {
+	struct mmc_host *mmc;
+	int ret;
+
+	printk(KERN_ERR "Emergency route taken.\n");
+	if (of_machine_is_compatible("asus,rk3288-tinker")) {
+		mmc = mSdhost->slot->mmc;
+
+		mmc_power_off(mmc);
+
+		mdelay(20);
+
+		if (!IS_ERR(mmc->supply.vmmc))
+			ret = regulator_enable(mmc->supply.vmmc);
+
+		if (!IS_ERR(mmc->supply.vqmmc))
+			regulator_set_voltage(mmc->supply.vqmmc, 3000000, 3300000);
+	}
+}
+EXPORT_SYMBOL(setmmcEmergency);
+
+
+
 static int dw_mci_init_slot_caps(struct dw_mci_slot *slot)
 {
 	struct dw_mci *host = slot->host;
@@ -2858,6 +2885,10 @@ static int dw_mci_init_slot(struct dw_mci *host)
 		mmc->f_max = freq[1];
 	}
 
+	/* Stupid Tinkerboard Hack */
+	if (of_find_property(host->dev->of_node, "supports-sd", NULL))
+		mSdhost = host;
+
 	/*if there are external regulators, get them*/
 	ret = mmc_regulator_get_supply(mmc);
 	if (ret)
diff --git a/include/linux/reboot.h b/include/linux/reboot.h
index e63799a6e..057d3ce0c 100644
--- a/include/linux/reboot.h
+++ b/include/linux/reboot.h
@@ -77,6 +77,8 @@ extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN];
 
 extern void orderly_poweroff(bool force);
 extern void orderly_reboot(void);
+/* Stupid Tinkerboard Hack */
+extern void setmmcEmergency(void);
 
 /*
  * Emergency restart, callable from an interrupt handler.
diff --git a/kernel/reboot.c b/kernel/reboot.c
index e4ced883d..c8e678ce6 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -61,6 +61,7 @@ void (*pm_power_off_prepare)(void);
 void emergency_restart(void)
 {
 	kmsg_dump(KMSG_DUMP_EMERG);
+	setmmcEmergency(); // Stupid Tinkerboard Hack
 	machine_emergency_restart();
 }
 EXPORT_SYMBOL_GPL(emergency_restart);
-- 
2.14.1

